Many dedicated followers were simply satisfied with the confirmation of Jon's return, but there's an exciting clue in this photo that's less obvious.

Jon is wearing Stark colors.

Looking carefully, you can see Harington sporting a navy blue undershirt with a long brown overcoat. Several Redditors identified this garb as "padded gamebson," a type of light armor.

This blue and brown padded gambeson was seen on the Stark soldiers in season one. You can see Ned Stark wearing it in this shot from the first season as well:

Ned Stark wore the padded gambeson at his execution in season one. HBO So Jon is wearing Stark armor. What does this mean for season six?

First, it signals the end of his time with the Night's Watch. Brothers of the Night's Watch are required to wear black from head to toe, abandoning their house colors. Clearly Jon is no longer bound to these rules.

But how?

Jon has always taken his vows very seriously. But if we had to guess, being stabbed repeatedly by his sworn brothers may have disenfranchised him. Plus, there's a loophole Jon may fit into.

The first line of the Night's Watch oath is: "Night gathers, and now my watch begins. It shall not end until my death."

Technically speaking, Jon's oath is fulfilled. He died. According to the standing theory, Jon was killed in the attack — but he will be resurrected by Melisandre.

This leaked set photo is the first confirmation fans have about Jon potentially being released from his duty to the Night's Watch. Speculative threads on Reddit's popular "A Song of Ice and Fire" subreddit from three years ago discuss this very idea. But now we're finally seeing it come to life.

If Jon is no longer a part of the Night's Watch, he is free to take charge of the Wildlings, and fight against the White Walkers without meddling in the politics of the Night's Watch. Jon can now participate in the wars of the Seven Kingdoms, avenging his family and leading the Starks. In early September, other leaked set photos allegedly showed a "northern battle" with the Boltons and Wildlings.

Jon could take charge, battling the Boltons and reclaiming the North. In season five, Stannis Baratheon offered Jon the lordship of Winterfell, but Jon had to refuse because of his Night's Watch vows. Now Jon is free to shed his bastard status and become a Stark the next time it is offered.